Ask your wife and see if she remembers whether it was pegged and, if it was, for long it was pegged before the engine stopped. If it was pegged for more than 45 seconds or so, you're more than likely going to need a new head (at least).

Take it to your indie and have him pull the head and check for deformation on both the head and the block. Maybe everything is fine and you'll just need a new head gasket. Maybe you'll need a head gasket and a head. Maybe you'll need a new motor. See? Too many variables to consider at this point. Taking it to an indie for a strip-down is the only thing you can do now (short of selling the car as is or just picking up a new motor without confirming what the problem with your current motor is).

Good lucka nd keep us posted as to how everything goes!

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2003 3.0i; Base Model Work Horse